Bafang 250w Reprogramming

[sparkysxx]

Hi,

Could anyone do some screen shots for me of whats the ideal settings to reprogram my 250w bafang mid drive to?

I've read it with penoff

Controller info:-

Manufacturer: HZXT
Model: SZZ9
Hardware ver: V1.1
Firmware ver: V2.2.0.1
Nominal voltage: 36V
Max current: 20A

Many thanks

 

[guerney]

Not new to the forum, but forgot my password and don't have the email address I used when I first registered in 2018 ish. Was just called sparkysx then.

Your previous incarnation @sparkysx installed a BBS01B onto a BMX.

https://www.pedelecs.co.uk/forum/members/sparkysx.24756/#recent-content


From that experience you already know to set keep current to 100%, among other things. Which bike is your new BBS01B installed on? Any photos?

Your 10Ah battery is limiting. Personally, I wouldn't increase the current limit from 15A.

Electric bicycle ebike Downtube Spare Ebike Battery 36V 10Ah Bottle Electric Bicycle Battery Pack f...
Item numberHAITU-3610
£113.10

Electric bicycle ebike Downtube Spare Ebike Battery 36V 10Ah Bottle Electric Bicycle Battery Pack fits 350W bafang tsdz2b motor

Electric bicycle ebike Downtube Spare Ebike Battery 36V 10Ah Bottle Electric Bicycle Battery Pack fits 350W bafang tsdz2b motor

www.pswpower.com

These settings make starts nice and controllable, and assistance cease rapidly. Easier to make U-turns.




The only changes I've made to the above: speed limit is now set to 25kph in firmware, rather than delegated to the display. Start degree is 2. My previous programming cable broke, I'll connect the new cable sometime. Others prefer Start degree set higher, but it suits me at 2.

 

[guerney]

can you re program it to less levels?

I'm pretty sure that it's a basic setting that you can change in the LCD, but limited options, like 3, 5 or 9 levels. If you get the programming cable, you can adjust the power for each level as well as set the number of levels.

AFAIK my DPC18 can't have the number of levels changed, but "many" 850C displays apparently can:

https://endless-sphere.com/sphere/threads/bbs02-pedal-assit-level-programming.124800/post-1815407

 

[sparkysxx]

AFAIK my DPC18 can't have the number of levels changed, but "many" 850C displays apparently can:

https://endless-sphere.com/sphere/threads/bbs02-pedal-assit-level-programming.124800/post-1815407

That was ages ago

Your previous incarnation @sparkysx installed a BBS01B onto a BMX.

https://www.pedelecs.co.uk/forum/members/sparkysx.24756/#recent-content


From that experience you already know to set keep current to 100%, among other things. Which bike is your new BBS01B installed on? Any photos?

Your 10Ah battery is limiting. Personally, I wouldn't increase the current limit from 15A.

Electric bicycle ebike Downtube Spare Ebike Battery 36V 10Ah Bottle Electric Bicycle Battery Pack fits 350W bafang tsdz2b motor

Electric bicycle ebike Downtube Spare Ebike Battery 36V 10Ah Bottle Electric Bicycle Battery Pack fits 350W bafang tsdz2b motor

www.pswpower.com

These settings make starts nice and controllable, and assistance cease rapidly. Easier to make U-turns.

View attachment 59729


The only changes I've made to the above: speed limit is now set to 25kph in firmware, rather than delegated to the display. Start degree is 2. My previous programming cable broke, I'll connect the new cable sometime.

Was ages ago that I had it on the BMX so I don't remember what settings I used at all, or whats best for it. I still have the bmx but it's standard now with no motor.

The motor came with the amps already set to 18.

 

[guerney]

Can you upload all of your settings? You could export and upload the configuration file. Alternatively copy screenshots to clipboard using ALT+PrintScreen, to paste directly in posts, or paste into an image editing program to save as .JPG files to upload.

 

[sparkysxx]

P.S, the bike isn't finished yet, I still need to base coat and lacquer the frame, its an old GT Aggressor 2, 26" wheels. I had a 250w bafang on it in 2019, took it off, sold it and I'm now doing it again. Totally don't remember anything about what values to use on the penoff program though.

 

[sparkysxx]

Took some pics last night

 

[guerney]

"Basic" tab: Your small battery will give a longer service life with "Current limit" set to 15A or less. For onroad riding, I'd set "Speed limit %" to 100% for every assist level.

Let us know how you get on. I'm sure battery experts and Bafangers of old and the currently Bafanged will chime in with suggestions and recommendations.

Here's a guide explaining settings:

Bafang Programming - Learn how to improve your Bafang mid-drive ebike - Edrivenet

Learn how to improve your Bafang mid-drive ebike. Reprogramming your Bafang mid-drive system can improve the usability and performance of your ebike a lot.

edrivenet.com

 

[guerney]

Another guide:

A Hacker’s Guide To Programming The BBS02 & BBSHD

One way that the BBS02 middrive unit shines over other competition like the Bosch is the ability to program the controller yourself. Although the process of programming the controller will void any…

electricbike-blog.com

@Nealh posted this guide recently...

Bafang central motor programming guide - Bafangers

Learn how to configure your Bafang motor to your liking and protect it from possible breakdowns with the appropriate USB cable and software.

www.bafangers.com

...which has this useful explanatory diagram: